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volume prisma = luas alas x tinggi
= 120 x 24
= 2880
diisi 3/4 bagian
3/4 x 2880 = 2160
9. 12,5 (C)
6,25 : 2 = 3,125 ------> besar perubahannya
B = 4 x 3,125 = 12,5
10. 8 ⁷/₂₄ (B)
kalikan dullu baru dikurang
2 ³/₄ = 11/4
3 ¹/₂ = 7/2
11/4 x 7/2 = 77/8 = 9 ⁵/₈
9⁵/₈ - 1 ¹/₃ = ( 9 - 1 ) ⁷ /₂₄ = 8⁷/₂₄
=120 x 24
=2880
3/4 V = 3/4 x 2880
= 2160 cm³ (C)
9) 2/4 = 6.25/b
b =4 x 6.25 /2
=12,5 (C)
10) 2 3/4 x 3 1/2 - 1 1/3
= 11/4 x 7/2 - 4/3
= 77/8 - 4 /3
kpk =231/24 - 32/24
= 199/24 = 8 7/24 (B)
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